I loaded from the main menu into a high RES after alt-tabbing out for a while to fix some things on my PC, and went to go hunt down a python with a bounty. As soon as I open fire, about 5 ships ascend into view in a rectangle formation next to and behind him, stare at me, and scan me. They weren't on the scanner until they just ascended from nothing. I should have gotten a screenshot but I was a little spooked by a bunch of guys showing up like I came to the wrong neighborhood. Thankfully I just got a "another useless spacer, get out of my way" message and they broke off while I went to continue hunting the bounty (who wasn't in a wing). I'm not sure if it's a bug or not, because it looked really coordinated with all of them ascending to the same height in a formation using their vertical thrusters, which I usually don't notice NPCs using exclusively to get around.